Click on http://www.sciencemuseum.org.uk/launchpad/launchball/

Rishel Bucks: Get one after completing each launchball puzzle by

reading the amazing science fact to me. Raise your hand. (Don't "Miss" me.) :)

If you are working at home, just copy the fact and ask your parent or guardian to sign it.

Cash it in for 2 Rishel Bucks.